Course Builder Fails to Save Lessons, When Lesson Count Reaches 100+

[chetawesomelaser1]

Reproduction Steps

• Created a new Course, added 200 lessons.
• Course Syllabus Block, read course as having 200 lessons
• Logged into Course as a Student. Course Syllabus presented 100 lessons. The last three in the syllabus read as "100 of 200"
• Returned to Course Builder, added another 70 classes. Attempted to save the course, but process timed out.

Expected Behavior

• Course Builder would present 200 lessons for a student to use.

Actual Behavior

• Student account ended up being able to access 216 lessons from the course.
• After continued testing, the Course Syllabus block was, on occasion, able to display more than 100 lessons. But often it was still well below the full lesson count.

Error Messages / Logs

N/A

System Information

System Report

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Browser, Device, and Operating System Information

• Chrome, MacOS

[thomasplevy]

At a glance if it's unclear if this as a scalability concern resulting from large DB queries to list sections/lessons or if there's something arbitrarily limiting lesson counts with a magic number

either way this should be addressed but going to push this to the future.

If you're building courses with this kind of structure in production please let me know

[kosmavm]

@thomasplevy we are not there yet, but we are intending to grow the course over the next year that covers a year's worth of content. From the way things are going, I anticipate ~50 lessons per term. I am tracking this issue, maybe by the time you address it, we will have enough content to be a guinea pig :)

[thomasplevy]

@kosmavm we actually mentioned this in our bug scrub this week and while we are not officially prioritizing anything here we are aware of the issues here with very large courses and are kicking around some ideas about how to solve this. Betas will certainly be released when we implement changes here so please keep your eye out.